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Course: Unit 14: 02.471 Basic Agricultural Science and Technology Keeping Animals Healthy Lesson 4: Kinds of Disease and Animal Responses to Disease GPS: AG-BAS-14-e, ELA10RC4 (a), SB4 Objectives: 1. Describe kinds of diseases and give examples of each. 2. Describe the ways animals respond to disease. Teaching Time: 1 2 hours References: Lee, Jasper S. & Diana L. Turner. Introduction to World AgriScience & Technology. Interstate Publishers, Inc. Danville, IL. 1997. Materials and Equipment: Overhead projector Course: 02.471 Basic Agricultural Science and Technology Revised May 2007 Unit 14, Lesson 4 1 Georgia Agriculture Education Curriculum TEACHING PROCEDURE Introduction and Mental Set Ask students: Has anyone ever had the chicken pox? If they have, how did they know that they did? Explain to them that this is a symptom. Discuss other disease symptoms. Discussion 1. What is a symptom? The way a disease shows itself. 2. What are the two classifications of disease? A. Contagious B. Noncontagious 3. What is meant by contagious disease? A disease that can be spread by direct of indirect contact of the animals. 4. What are the major causes of contagious disease? A. Bacteria B. Protozoa C. Viruses D. Fungi E. Parasitic $ Internal $ External 5. What is meant by noncontagious disease? Disease caused by conditions or substances that aren=t transferred from one animal to another. 6. What are some types of noncontagious diseases? A. Injuries B. Poisons $ Pesticides $ Fertilizers $ Substances in plants (prussic acid) C. Faulty body processes $ Milk fever Course: 02.471 Basic Agricultural Science and Technology Revised May 2007 Unit 14, Lesson 4 2 Georgia Agriculture Education Curriculum D. E. $ Heart failure $ Acetonemia Congenital diseases Inadequate nutrition 7. What is an infectious disease? A disease that gets inside an animal=s body. 8. How are animal diseases classified according to the time of affliction? A. Chronic - afflict animals for a long period of time B. Acute - afflict animals for a short period of time 9. What is a body system disease? A disease that attacks only certain systems of the body. A. Digestive system diseases B. Genitourinary diseases C. Respiratory diseases D. Circulatory system diseases E. Nervous system diseases 10. Name some selected diseases and the species of animals it mainly affects. A. Anaplasmosis - Attack red blood corpuscles. Cattle are primarily affected. B. Anthrax - Mostly frequently affects cattle on pasture. Animals have fever, rapid respiration, and swelling on the neck. C. Blackleg - Primarily affects cattle, though sheep and goats can get it. Symptoms include high fever, swelling in the neck and shoulder area, muscles in the neck, shoulder, and thighs crackle when mashed, loss of appetite and death. D. Bang=s Disease (brucellosis) - Affects cattle, sheep, goats, and hogs. Reproductive disease. E. Hog Cholera - Highly contagious viral disease of hogs. F. Coccidiosis - Parasitic disease of poultry. G. Equine Sleeping Sickness - Virus that is transmitted by insects. H. Foot and Mouth Disease - Highly contagious disease caused by a virus that affects animals with cloven (divided) feet. I. J. Grubs (Warbles) - Internal parasites caused by heel flies. Affect cattle primarily. Leptospirosis - Bacterial disease that affects cattle, sheep, and Course: 02.471 Basic Agricultural Science and Technology Revised May 2007 Unit 14, Lesson 4 3 Georgia Agriculture Education Curriculum K. L. M. N. most other farm animals. Lice - Small blood sucking insects that attack cattle, hogs, and other species. Mastitis - Bacterial infection of the udder of female cattle, sheep, goats, and swine. Roundworms and tapeworms - Stomach and intestinal worms that can infect all animals. Shipping Fever - Environmental disease of cattle and sheep that is a particular problem for younger animals. 11. What are the primary defenders against disease? A. Skin B. Mucous membrane 12. What are the secondary defenders against disease? A. Antibodies B. Phagocytes Summary Diseases can be classified in several ways: contagious, noncontagious. Infectious diseases are caused by organisms that get into the animal=s body. Evaluation Written Exam Course: 02.471 Basic Agricultural Science and Technology Revised May 2007 Unit 14, Lesson 4 4